Rubber mil-r-3065 grade sa405b, c, f, z, or sa505 b, c, f, z, or sb410b, c, f, z, or sb510b, c, f, z, 4.500 in.Lg, 1.500 in.W, 0.375 in.Thk of matl, 4 holes 0.750 in.Dia equally spaced on center line along the lg, 0.750 in.Distance from center of first hole to edge along the lg